Xshell使用密钥登录Linux服务器

男娘i 2022-01-29 19:41 549阅读 0赞

1、使用如下命令生成密钥对  
\[root@xuegod130 ~\]\# ssh-keygen  
Generating public/private rsa key pair.  
Enter file in which to save the key (/root/.ssh/id\_rsa): \#直接回车  
Enter passphrase (empty for no passphrase): \#输入密钥的密码  
Enter same passphrase again: \#再次输入密钥密码  
Your identification has been saved in /root/.ssh/id\_rsa.  
Your public key has been saved in /root/.ssh/id\_rsa.pub.  
The key fingerprint is:  
SHA256:Y8K3Am4qdviR5IJC0xrVVNPQWHB9eR4fYgXBFh/qd0M root@xuegod130.localdomain  
The key’s randomart image is:  
±–\[RSA 2048\]----+  
| …=Bo. .+\*o |  
| o .oo . Bo+.|  
| . . +.+E+|  
| o . . …|  
| + o. o S . o.|  
|o \*… + o . o|  
|oo.+o . . |  
|oo.+. . |  
|…+. |  
±—\[SHA256\]-----+

2、将密钥文件导入到authorized\_keys文件，因为ssh的配置里面规定了读取密钥是从这个文件来读取的，如下：  
\[root@xuegod130 ~\]\# vim /etc/ssh/sshd\_config  
47 AuthorizedKeysFile .ssh/authorized\_keys  
将密钥文件导入到authorized\_keys文件  
\[root@xuegod130 ~\]\# cd /root/.ssh/  
\[root@xuegod130 .ssh\]\# ls  
id\_dsa id\_dsa.pub  
\[root@xuegod130 .ssh\]\# cat id\_dsa > authorized\_keys  
\[root@xuegod130 .ssh\]\# ls  
authorized\_keys id\_dsa id\_dsa.pub

3、使用xshell登录后，将id\_dsa文件下载本地  
\[root@xuegod130 .ssh\]\# sz id\_dsa

4、修改ssh服务的配置文件，只允许密钥登录  
\[root@xuegod130 ~\]\# vim /etc/ssh/sshd\_config  
64 PasswordAuthentication no \#将yes改为no，不要密码登录

5、重启sshd服务  
\[root@xuegod130 ~\]\# systemctl restart sshd  
6、使用xshell登录  
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